FN Archimer Export Format
PT J
TI Sea-air CO2 fluxes in the Indian Ocean between 1990 and 2009
BT 
AF SARMA, V. V. S. S.
   LENTON, A.
   LAW, R. M.
   METZL, N.
   PATRA, P. K.
   DONEY, S.
   LIMA, I. D.
   DLUGOKENCKY, E.
   RAMONET, M.
   VALSALA, V.
AS 1:1;2:2;3:3;4:4;5:5;6:6;7:6;8:7;9:8;10:9;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 CSIR Natl Inst Oceanog, Visakhapatnam, Andhra Pradesh, India.
   CSIRO, Ctr Australian Weather & Climate Res, Hobart, Tas, Australia.
   CSIRO, Ctr Australian Weather & Climate Res, Aspendale, Vic, Australia.
   Univ Paris 06, CNRS, LOCEAN IPSL, F-75252 Paris, France.
   JAMSTEC, Res Inst Global Change, Yokohama, Kanagawa 2360001, Japan.
   Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
   NOAA, Global Monitoring Div, ESRL, Boulder, CO USA.
   CEA CNRS UVSQ, LSCE, Gif Sur Yvette, France.
   Indian Inst Trop Meteorol, Pune, Maharashtra, India.
C2 NATL INST OCEANOG VISAKHAPATNAM, INDIA
   CSIRO, AUSTRALIA
   CSIRO, AUSTRALIA
   UNIV PARIS 06, FRANCE
   JAMSTEC, JAPAN
   WHOI, USA
   NOAA, USA
   CEA, FRANCE
   IITM, INDIA
IN DOAJ
IF 3.753
TC 50
UR https://archimer.ifremer.fr/doc/00253/36408/34948.pdf
LA English
DT Article
CR OISO 8
   OISO1
   OISO2
   OISO3-NIVMER98
   OISO4 (VT 46)
   OISO5 (VT 49)
   VT 105 / OISO 17
   VT 108 / OISO-18
   VT 51 / OISO 6
   VT 57 / OISO 9
   VT 60 / CARAUS - OISO 10
   VT 62 / CARAUS - OISO 11
   VT 79 / OISO 12
   VT 80 / OISO 13
   VT 81 / OISO 14
   VT 85 / OISO 15
   VT 94 / OISO 16
BO Marion Dufresne
AB The Indian Ocean (44 degrees S-30 degrees N) plays an important role in the global carbon cycle, yet it remains one of the most poorly sampled ocean regions. Several approaches have been used to estimate net sea-air CO2 fluxes in this region: interpolated observations, ocean biogeochemical models, atmospheric and ocean inversions. As part of the RECCAP (REgional Carbon Cycle Assessment and Processes) project, we combine these different approaches to quantify and assess the magnitude and variability in Indian Ocean sea-air CO2 fluxes between 1990 and 2009. Using all of the models and inversions, the median annual mean sea-air CO2 uptake of -0.37 +/- 0.06 PgC yr(-1) is consistent with the -0.24 +/- 0.12 PgC yr(-1) calculated from observations. The fluxes from the southern Indian Ocean (18-44 degrees S; -0.43 +/- 0.07 PgC yr(-1)) are similar in magnitude to the annual uptake for the entire Indian Ocean. All models capture the observed pattern of fluxes in the Indian Ocean with the following exceptions: underestimation of upwelling fluxes in the northwestern region (off Oman and Somalia), overestimation in the northeastern region (Bay of Bengal) and underestimation of the CO2 sink in the subtropical convergence zone. These differences were mainly driven by lack of atmospheric CO2 data in atmospheric inversions, and poor simulation of monsoonal currents and freshwater discharge in ocean biogeochemical models. Overall, the models and inversions do capture the phase of the observed seasonality for the entire Indian Ocean but overestimate the magnitude. The predicted sea-air CO2 fluxes by ocean biogeochemical models (OBGMs) respond to seasonal variability with strong phase lags with reference to climatological CO2 flux, whereas the atmospheric inversions predicted an order of magnitude higher seasonal flux than OBGMs. The simulated interannual variability by the OBGMs is weaker than that found by atmospheric inversions. Prediction of such weak interannual variability in CO2 fluxes by atmospheric inversions was mainly caused by a lack of atmospheric data in the Indian Ocean. The OBGM models suggest a small strengthening of the sink over the period 1990-2009 of -0.01 PgC decade(-1) . This is inconsistent with the observations in the southwestern Indian Ocean that shows the growth rate of oceanic pCO(2) was faster than the observed atmospheric CO2 growth, a finding attributed to the trend of the Southern Annular Mode (SAM) during the 1990s.
PY 2013
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 10
IS 11
UT 000327814700018
BP 7035
EP 7052
DI 10.5194/bg-10-7035-2013
ID 36408
ER

EF